Flexible Low Temperature Seals by Polypac
Flexible Low Temperature Seals — Reliable Performance in Cold Environments
Product Overview
Polypac's Flexible Low Temperature Seals are engineered to maintain elasticity, sealing integrity and low friction at sub-zero temperatures. Leveraging our decades of experience in filled PTFE and a wide range of elastomers (NBR, FKM, silicone, EPDM, FFKM), these seals are optimized for cryogenic and cold-climate applications where conventional seals stiffen or fail.
Key Features & Benefits
Designed for longevity and consistent performance, our Flexible Low Temperature Seals offer low compression set, excellent chemical compatibility and reduced wear. Benefits include improved energy efficiency, minimized leakage risk and extended maintenance intervals—critical for hydraulic systems, valves and rotating equipment operating in cold conditions.
Materials & Performance
Starting from our core expertise in filled PTFE (bronze, carbon, graphite, MoS₂, glass), we develop compound formulations and elastomer blends specifically for low-temperature flexibility. Whether you need a PTFE-based lip seal or a silicone O-ring, Polypac tailors material hardness and filler content to balance flexibility with pressure and thermal resistance.
Applications & Industries
Flexible Low Temperature Seals from Polypac serve aerospace, cryogenics, oil & gas, marine, and industrial refrigeration markets. Typical uses include hydraulic actuators, cryogenic valves, compressors and deep-freeze process equipment where sealing reliability at low temperatures is mission-critical.
Customization & Manufacturing
Our custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of advanced production space. Polypac provides bespoke designs, rapid prototyping and precision tooling to meet tight tolerances. We collaborate with universities and research institutions to evolve materials and meet unique service environments.
Quality Assurance & Testing
Polypac subjects Flexible Low Temperature Seals to rigorous simulation and laboratory testing, including thermal cycling, low-temperature compression set and chemical exposure tests. Our inspection protocols and industry-grade equipment ensure each seal meets or exceeds performance specifications.
Why Choose Polypac
Founded in 2008, Polypac combines scientific R&D with award-winning manufacturing. When you require dependable Flexible Low Temperature Seals, we deliver engineered solutions, consistent quality and supply-chain reliability tailored to extreme cold environments.
Flexible Low Temperature Seals Display
How can I prevent seal damage during installation?
Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.
What is the difference between a static seal and a dynamic seal?
A Static Seal is used between two surfaces that do not move relative to each other (e.g., pipe flanges, end caps). O-rings and gaskets are common static seals. A Dynamic Seal is used between surfaces that do move (e.g., piston and cylinder, rotating shaft). Rod seals, piston seals, and rotary shaft seals are designed for this purpose.
How do I choose the right material for my sealing application?
Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.
When should I use a spring-energized seal instead of a standard elastomeric seal?
Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.
What is the difference between NBR and FKM materials?
NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.
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